http://www.rfc-editor.org/rfc/rfc1930.txt
RFC 1930: Guidelines for creation, selection, and registration of an Autonomous System (AS), J. Hawkinson, T. Bates1996-03-01T23:00:00-00:00This memo discusses when it is appropriate to register and utilize an Autonomous System (AS), and lists criteria for such. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.